eke-eke the Sega emulator guru has updated his Sega Genesis / Mega Drive, Sega/Mega CD, Master System, Game Gear & SG-1000 emulator for the GameCube/Wii to v1.7.1. This new release primarily adds Sega CDDA audio playback for all Sega CD games, amongst many other improvements. That's right, Sega CD support with full CD quality audio support on the GameCube!
Download/Discuss it here
Official GoogleCode project page
Full ChangeLog